SINGLE-PHOTON DETECTOR TIMING ADJUSTMENT METHOD AND DEVICE IN QUANTUM KEY DISTRIBUTION SYSTEM, AND STORAGE MEDIUM

摘要

Provided are: a timing adjustment method and device that are capable of setting a timing at which main pulse detection efficiency is highest and capable of shortening adjustment time; and a recording medium. The method for adjusting the detection timing of a single-photon detector for detecting a weak photon pulse in a quantum key distribution system (QKD) comprises: recording the number of detected photons at each timing by scanning a gate application timing within a prescribed scanning range; extracting the peaks at at least two points adjacent to each other in the recorded number of detected photons; evaluating error rates at the extracted peaks at at least two points; and setting the detection timing at the peak of the lower error rate.